When Amanda’s monthly electricity bill increased for the third month in a row, she decided to investigate where the extra energy was going.

She started with one of the most common pieces of advice found online: unplug appliances that aren’t being used.

The microwave seemed like the perfect place to begin. Its digital clock stayed illuminated around the clock, even when no one was cooking. If that tiny display used electricity 24 hours a day, perhaps disconnecting it would make a noticeable difference.

For two weeks, Amanda unplugged the microwave immediately after every use and plugged it back in only when needed. She also kept a notebook recording the household’s daily habits so she could compare them with the next utility statement.

At the end of the experiment, the bill arrived.

The result surprised her.

The savings from unplugging the microwave alone were very small—only a few cents over the two-week period.

That wasn’t disappointing; it was educational.

Modern microwaves typically consume only a small amount of standby power, mostly to operate the digital clock and electronic controls. While the exact amount varies by model, the annual cost is generally modest.

Instead of stopping there, Amanda looked for larger sources of electricity use.

She discovered that several habits had a much greater impact on her monthly bill:

• Adjusting the thermostat by just a degree or two during the day.
• Washing clothes in cold water whenever possible.
• Running the dishwasher only with full loads.
• Replacing older incandescent bulbs with LED lighting.
• Cleaning the refrigerator coils to improve efficiency.
• Using ceiling fans to reduce air-conditioning demand.
• Sealing small drafts around doors and windows.

Within the next billing cycle, these combined changes produced a noticeably larger reduction in electricity use than unplugging the microwave alone.

Amanda also learned about “phantom” or “standby” power. Many electronic devices continue drawing small amounts of electricity even when switched off, especially televisions, game consoles, cable boxes, printers, and desktop computers.

For households with many electronics, connecting several devices to a smart power strip can make it easier to eliminate unnecessary standby power with a single switch.

The experience changed the way Amanda viewed energy savings.

Rather than searching for one dramatic solution, she realized that consistent habits usually produce better long-term results than any single trick.

Unplugging a microwave isn’t harmful and may save a small amount of electricity over time. However, the biggest opportunities to reduce an electric bill often come from heating and cooling systems, water heating, major appliances, insulation, and everyday energy habits.

By the end of the month, Amanda had reduced her overall electricity use without sacrificing comfort. More importantly, she understood where her home’s energy was actually being used.

Sometimes the most valuable result of a simple experiment isn’t the money saved—it’s discovering which changes truly make a difference and which ones are mostly myths.